Engraving-machine.



ENGRJWING MACHINE.

[Application filed. July 27, 1896.)

(No Model.) Y 7 sheets-Shae! Wihmwm bve'n [or l W {M n4: Noam: PETERSco, wow-undo, msnmcmu, a c

5M0. lEfiUflBfl. Patented Oct. l6, I900. A. SARTIRANA.

EWGBMHWG MACHINE.

(Application 111m July 27, 1896.)

(We Wlodel.) 7 Sheets-Sheei 2 W51 Zia 2 12501" fink Q7 $.41 W

TNE uonms warms c0, PHOTO-LUNG" WASHWOYON, n, c

We. ammo. Patented Dot. I6, I900. A. SARTIRANA. ENGRAVING MACHINE.

(Application filed July 27, was.

7 Sheets-Sheet 3.

(No Model.)

N0. EMLUSU. Patented 00f. l6, I900. M. SARTIRANA.

ENGRAVING MACHINE.

(Application filed July 27, 1896.)

7 Sheets-Sheel 4.

(No Model.)

Wfnamw m: NORRIS Perms co, Pworumnu, WASHWGTON, o c.

7 Sheets--Sheat 5,

Patented 0st. l6, 900.

No. 660mm.

M. SARTIBANA. ENGBQMHNG MACHINE.

(Application filed July 27, 1898'.) (No Model.)

Wb l nespe; QBNRAM N0. EWMMIL Patented Hot. l6, I900. M. SfiRTiRMM.

EWGRMHMG MACHINE.

(Application filed July 27, 1896.)

7 Sheets-Sheet 6.

(N0 Modal.)

Mentor Waillmmsa'eas' m. mm. Patented Dot. l6, I900, A. sMTmAM.

EWGBAVING HA SHINE (Application filed July 27, 1896. (No Modal.) 7Sheets-Sheet 7.

FIG-12 FIG-l4:

lli'rtn States ATE i rricE.

ENG HAVING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 660,030, dated October16, 1900. Application filed July 27,1896. Serial No. 600.663. (N model.)

To all whom, it Duty concern..-

Be it known that I, AUGUSTIN SARTIRANA, a citizen of the FrenchRepublic, residing at Lyons, in the Republic of France, have inventedcertain new and useful Improvements in Engrai ing-Machines, (for which Ihave obtained a patent in France, dated March 12, 1896,) of which thefollowing is a specification, reference being had to the accompanyint,drawings.

My in ven tion relates to en graving-machi nes of the type shown in theFrench Letters Patent granted me the 29th day of November, 1894., No.165,678, and in Swiss Letters Patcnt granted the 21st day of October,1890, No. 2,805.

It is the purpose of said invention to provide a machine capable ofproducing engravings on wood or metal which are accurate re productionsof a photographic gelatin plate in relief, the latter being produced bythe method well known in photolithographic work. It is my aim to providea machine of this kind which shall be automatic in operation; and myinvention consists in the parts and new combinations of partshereinafter explained and then particularly pointed out in the claims.

For the purposes of the following description reference is had to theaccompanying drawings, in which- Figs. 1 and 1, taken together,represent my invention in side elevation, one end being partly insection in Fig. 1. Figs. 2 and 2, taken together, represent the machinein plan view. Fig. 3 is a sect-ion upon the line (i, Fig. 1. Fig. 1 is asection upon the line 7 8, Fig. 1. Fig. 5 is a face view or elevation ofthe steel slide. Fig. 6 is aview in Two parts, showing the bar whichcarries the tracing-point in elevation and in plan. Fig. 7 is a view inelevation and in plan showing the bar which carries the gravel. Fig. 8is an elevation of the controlling-bar. Fig. 9 is an elevation of thecross-head. Fig. 10 is a view in three parisviz., an elevation, a plan,and a section on the line 9 lO--showing the support for thecontrolling-bar. Fig. 1]. is a detail side elevation, upon an enlargedscale, showing the hooked spring and lifting device which is attached tothe tracer-carrying bar. Fig. 12 is a detail view of the graver andtracer bars in side elevation. Fig. 13 is a plan view of the same. Fig.14. is a section upon the line 11 12 in either of the figures lastdescribed.

The machine is composed of two principal parts-a fixed frame and acarriage.

The bed or table A, which may be of castiron or other suitable material,is of rectangular shape and has its upper surface made perfectly true.It is prepared in the same way as the surface plates employed inmechanical workshops and is strongly ribbed below its surface in orderto insure its complete rigidity, which without this precaution might bedestroyed owing to fault-y erection, and it is absolutely necessary thatit should be an exact plane. Upon the upper surface of this bed or tableand in fixed positions are located two turn-tables B B, which receivethe plate to be engraved and the model in gelatin respectively. Thesetables are adapted to move in two directions at right angles to eachother in the same way as a slide-rest on a lathe by means of slidewaysa, attached to the surface of the bed or table and to one of theturn-tables, and adjusting-screws b, by which they can be made to occupythe desired position on the table or bed of the machine. Both the saidtables are surmounted by a plate of bronze -c, pivotally mounted ontheir centers by means of a circular tenon which fits exactly into arecess or mortise provided in the supports. In to these bronze plates,of which the arrangement has been described, two circular plates (Z, ofthe same metal, are carefully fitted in close contact with the surfacesof the rectangular plates. These circular plates are intended to servethe same purpose as the others, but are of smaller dimensions, so as topermit of turning the objects placed upon them through any desiredangle.

The support or table B, intended for the reception of the plate to beengraved, may receive when necessary a current of hotair for raising thetemperature of the said plate by means of recesses formed in the body ofthe support and corresponding to a circular openinge in the bed or tableA, as shown in Fig. 1.

The bed or table is provided at each of the short sides thereof with aslideway O, of cast.- iron, at. each extremity of which is arranged TCI)said slideways,the surface g, on which the carriage slides easily, andalso the faces of the abutment 77, will all be strictly parallel onewith another and with the surface of the bed or table A. In the bearingsf of the slideways 0 two accurately-cut and similar screws D D aremounted at their extremities, which are not screw-threaded. Thesescrews, which are normally free to turn in their bearings, may be fixedduring the execution of an e-n- I graving by means of a set-screw tinthe bearingsf at the side where the heads of the screws are situated.They are prevented from mov- K ving in the direction of their lengthatone end 3 by means of the said heads and at the other by a nut.A-chain E gears with the two chainwheels F F, arranged on theextremities of the screws D D, and enables the motion imparted to onescrew by means of a crank ori handle applied to the square end thereofto be transmitted to the other in Whichever direction it takes placeafter loosening the setscrews 1 which are situated in the bearings.

The frame-plate or main support G of the carriage is parallel with thelonger sides of.

the bed or table and occupies a position exactly at right angles to theslideways O C. Said frame-plate is formed of bronze and is stronglyribbed in order to make it very rigid.

The carriage-frame is supported at its extremities on thebearing-surfaces g g, which should be true and sin th and parallel tothe-surface of the table and tothe ab-utments h h in the slideways G.The extremities of.

said frame arecou-nected to twosuppor-ts H H by strong screws, so as tobe practically integral with same;

The carriage is intended to slide easily along the-slideways O 0, alwaysremaining strictly perpendicular tdthesame by means 1 of bronzeguide-blocksj, with which the lower extremitiesof the supports H H areprovided.

The-supports H H, above referred to, which are of steel, carry in arecess provided for the purpose ratchet-wheels I I, the axes of whichcoincide with those of the main screws D D, which pass through them.

The ratchets I I are provided with levers J J, having pawls 0, whichengage the teeth of the ratchets when moved in one direction and rideover said teeth when moved in the opposite direction. oted to rock inarcs which are concentric Said levers J J are ,piv-:

with the screws D, and they are moved by coupling-bars K, oneat each endof theframe 1 G. These coupling-bars are dovetailed incross-section andlie in recesses of cone. 1 sponding form in the slide N, as shown inFig. 4.

The operation is as follows: To one of the coupling=bars K, (seethe-second part of Fig.

is attached, by means of ascrew, a riderZ,

at the end of which is seen arod 7r, to one end of which is attached aring Z. A spring n is coiled upon the rod 70, one of its ends pushingagainst the ring Z and its other end when the carriage moves to theright against a tappet 'm, which is placed against the vertical guide'wof the controlling-arm P. When the carriage after finishing itsoperative movement returns to the right in order to repeat the operationand make a new stroke of the burin, the tappet m presses on the springn, which pushes moderately upon the ring Z,

the rod 7c, and the rider Z, which is attached to it. The connecting-rod7a, which has a gudgeon at each of its extremities, is thus brought intoaction upon the ratchets I I through the pawl-levers J J, which turn thesaid ratchets through a space or are corresponding in extent t-o one ormore of the teeth on said ratche'ts. This space is regulated by theadjustment of the ring Z upon the rod k. The coupling-bar K, whichconnects the pawlleve'rs, .is afterward brought back to its originalposition by means of a stud 19, against which the cross-head O strikesin its return movement. The ratchet wheels carry in front on one oftheir diameters two projections or tenons-Z Z, (shown in dotted lines inFig. 1,) engaging with the recesses m m", provided on the rear face "ofthe cylindrical bronze nuts L L, which are arranged upon the screws D D,between the ratchet-wheels and the engaging blocks M M, with. which thesupports of ithe'carriage-frame are provided. The frame G has also fixedby three screws g on its front face a steel support N, from end to endof which the cross-head 0 travels with a reciprocating motion, which isimparted to it by .a motor 8 through the speed-reducing gear T. Saidcross-head O carries with i-tthree bars P Q R, these being the partswhich sustain the graver and tracer.

These parts are denoted by the letters P, R, and Q, the bar R carryingthe gravi-ng-t'ool g and the bar Q carrying the tracing instrument c"and so connected that the movements given to the latter by passingoverthe reliefs ofwa pattern will be reproduced in the former, so that if anoperative movement is at the same time imparted to the bars the graverwill be caused to cut in a plate submitted to its action an accurateimitation of the pattern. The-specific functions and relatio-nsof theseparts will be explained in their order hereinafter.

The cross-head 0 (shown separately in Fig. 9) is provided near its endswith bronze boxes 1", having flanges 11 arranged vertically on saidboxes at the ends of the cross-head O. The cross-head is guided on thesupport N by blocks t, which are adjusted by set-screws u. (Shown inFig. t.)

The bar P, which is arranged against the 1 boxes r of the cross-head Oand which is free to move in a vertical direction, slides between theflanges o en the bronze cross-head boxes. This bar, which I term thecontrolling-bar,

carries at one of its ends, secured thereto by screws '2), a verticalguide 20, and its motion of translation is imparted to it by thecrosshead 0, which carries it along by the engagement of a stud 2 whichis screwed into a threaded opening in that'one of the bronze cross-headboxes 7* which overlies the opening or mortise it in the end of thecontrollingbar P, as shown in Fig. 9. When the parts P, Q, and R areoperatively connected, as shown in Figs. 12, 13, and 14, and arranged onthe cross-head, the stud y lies in the opening a and the controlling-barP is carried along thereby, accompanying the movement of the crossheadO. The horizontal position which it assumes is obtained by its restingon one side by means of its support U, which is located at some point ofits length upon the plate .2 to be engraved and on the other side at itsextremity by means of a shoulder a, formed on its edge and intended toslide upon the bridge V, which is itself supported upon the edges of theglass support I) for the gelatin print. At the other extremity of thecontrolling-bar P and at such a height as to insure that the bar Q,carrying the blunt or tracing point, shall have as nearly as possible acorresponding position to that occupied by the controllingbar jaws c arearranged to connect the two bars by means of a thin steel blade (6,which serves as an axis and at the same time leaves the bar Q perfectlyfree to move vertically without causing wear or allowing play betweenthe extremities of the parts. This bar Q, carrying the blunt or tracingpoint, has on its lower edge a spring e, the tension of which can beeasily regulated by means of the slide f according as it is necessary toincrease or diminish the penetrating force of the grave/r g to obtain anengraving more or less deep. A second slide 7t, similar to thatjustret'erred to, which is also fixed to the bar Q, transmits to the barR, carrying the graver, the movements which are imparted to the bar Q bythe blunt point t", which is fixed to it, in following the reliefs ofthe gelatin printj. The bar R, carrying the graver, which is below thebar Q, is fixed to the controlling-bar P by an axis X, around which itcan oscillate in a vertical direction, pressed above or below by theslide h and the spring 6. This barR carries, fixed firmly to its frontface by two set-screws 7s, a graver g for cutting the metal plate.

The engravingmachine, the details and working of which have beenhereinbefore described, produces really good results only when the toolacts on the forward stroke. If it cut the metal during the reversemovement-that is to say, when the apparatus is resuming its initialpositionin other words, that which it had at firstthe metal would notoffer a suitable surface for the firm and free out which is required inmy system of engraving. In order to remedy whatis, in my opinion, agrave defect in spite of all the attempts which I have made to apply tothis part of my machine theadvantages which it was thought to obtain bythe employment of electricity, I arrange on the support N two smallbrackets Z and Z", which support parallel to the bar Q, carrying theblunt point, a horizontal rod we, provided with two tappets 12 and s.These tappets are capable of adjustment upon the rod m, so that they canbe separated by a greater or less distance, according to the dimensionsof the print to be reproduced. The two tappets 'n and .9 remain withoutmovement during the action of the engraving-tool g. Said tappet-saccompany the frame G in its movement of displacement along the slides OC, said movement being produced by the screw-shafts D D; but they arefixed, so far as regards longitudinal movement, in a line parallel withthe cutting movement of the engravingtool. As the graving-tool movesforward a pin 0 at the end of the bar Q is brought into engagement withthe tappet 9t and rides upward upon an inclined face on said tappetuntil a s .)ring-hook 12, also mounted on the bar Q, as seen in Fig. 11,is forced against and over a lug g, which projects from the verticalguide w upon the end of the controlling-bar P. This operation raises thetracer-carrying bar Q, and by the adjustment of the tappet 72 upon therod m the tracer is raised from the pattern at the exact point required,the graving-tool being also raised at the same instant. Both tools areheld in raised position by the engagement of the spring-hook p with theprojecting lug q during the movement which precedes another operat-ionof the graver. Upon the completion of this movement the pin 0 is broughtinto engagement with the other tappet s, which forces the bar out ofengagement with the guide. The pin 0 then falls upon the flat face ofthe tappet .9 and upon the forward or operative movement of the partsresumes its normal posit-ion.

The principal parts constituting my automatic engravinginacliine whenconstructed with precision and assembled in the manner above describedinsure an exact and regular action of the rectilinear perpendicularmovements to which the assemblage of the three coupled bars P, Q, and Ris fitted. These parts effect the work required of them-that is to say,that by their arrangement I reproduce the reliefs of gelatin printsobtained by photographic means in either simple parallel cuts orcross-hatchings of a width exactly proportional in every point to theprint which serves as a model. As a result of this the surface of themetal plate receives the inking medium employed in such a manner that bythe juxtaposition of the lines I obtain, when printing from the plate,prints to any number, which reproduce with the greatest fidelity themodel from which it was desired to form an engraving, even when theprinting has been done on the quick rotary machines now in use, whiledoing away with punching and considerably reducing the preliminary IIOon metal or on wood in the following manner:

I uncover sufficiently the turn-tables d d in sending back the carriageby means of the screws D D, which I actuate by a handle applied to thesquare end of one of them after having previously freed theratchet-wheels from the pawls. I then fix upon the bronze plates d d,above referred to, either with wax or'otherwise, the substance to beengraved,

whether metal, wood, or any other suitable substance, upon its glasssupport b, and the gelatin print in the same way, the engravingplate atz and the gelatin at 3', the gelatin having been obtained by exposure tothe-suns rays behind a negative photographic plate representing anysubject whatever which it is desired to reproduce by my engravingprocess. The plates so fixed should have their centers upon one and'thesame line parallel to the slide N and should correspond as nearly aspossible with the centers of the tables upon which they are fixed.-Their dimensions should be such that while the blunt point t istraversing the surface of the gelatin j the graver g does not leave theengraving-plate z. I then move the carriage back until the blunt pointt" coincides with a point upon the gelatin print corresponding with thepoint where the work of the graving-tool should begin upon the plate .2.At the same time Icause the nose or shoulder a of the controlling-bar Pto rest upon the upper surface of the bridge V, holding it there bymeans of the screw 15 and the spring a. The bridge V lies parallel withthe line of movement of the blunt point a and tracer 1;. The lower faceof said bridge is recessed to prevent it from comin gin contact with thesurface of the gelatin print, and its ends rest on the edges of theglass support I), on which said print is placed. Said bridge receivesmovement from the frame G, by which it is carried step by step from oneside of the gelatin print to the other. It preserves the same positionrelatively to the blunt point a throughout the process of engraving. Thehead of the binding-screw y of the support U (see Fig. 10) now restsupon the steel ribbon '0', which is suitably stretched by a threadedbolt Z (Figs. 1 and 2) on the surface of the engraving-plate z in suchmanner that it is exactly opposite the point of the graver g, fixed tothe graver-arm R, and the shoulder a bears the same relation, so far asits posiseeped tion is regarded, to the blunt point t". The graver g inthe position which is given to it should be at such a height that whenthe required cuts have been made it will skim over or barely touch thesurface of the metal in the parts corresponding to the highest reliefsof the gelatin print, and if it has been set in such a manner as to havethe necessary angle it should impart to the plate the exact effect ofthe model. At the same time also I fix the screws D D in theirbearingsff by means of the set-screws 7 '5. I arrange the shoulders ofthe rods 1)" b at the required distance for reversing the movement whenthe blunt point coincides with each side of the frame i i of the gelatinproof. I also regulate the distance separating the tappets n and s,which raise and depress the tracercarrying bar Q, in order that saidtracer, as well as the graver, shall execute their work exactly in thelimits of the frame which has been decided upon. The ring Z of the rod7t is in its turn arranged in such a manner that the blunt point ibeingu'pon the edge of the frame containing the gelatin print the blockin, by means of the spiral spring or (which actuates the pawl-leversthrough the said rod shall have moved the pawls of the levers J J to theextent of their travel. The stud p on the coupling-bar K having alsobeen arranged so that during the backward movement, which will afterwardbe imparted to it by the cross-head, the pawls 0 will pass the samenumber of teeth previously decided upon, themachine is now in workingorder. If I wish to execute an engraving, I complete the electriccircuit by actuating the lever of'the contact-breaker g", which isarranged upon the frame. The main current immediately excites the polesof the reversible motor. A part of the current now traverses thecommutator Y, passing by two of its contacts to the armature, which itsets in motion in such a direction that after having been reduced by adevice T, which includes a pulley .upon which a traction-cable d iswound, the cross-head and the arms, with which it is provided, move in aregular manner while the graver makes a cut. During this movement thetracer-carrying bar Q is raised and depressed in a vertical direction bythe action of the controlling-bar P sliding upon a smooth surface of theengraving-plate z and then by the blunt point t", which follows thereliefs of the gelatin print. As a consequence of the movements of thesaid arm Q the arm R, carrying the graver, with which it is in constantcontact through the spring 6, which presses it against the slide h,executes the same movements and in the same direction as those of thetracer-arm Q1novements which will be of a magnitude which can beconfined within the desired limits by adjustment of the slide it. Thegraver c, which is firmly fixed to the arm R by set-screws 7c is and towhich motion is imparted by the travel of the apparatus along the slideN of the frame G and of the arms, cuts the metal in transforming thereliefs of the gelatin print int-o cuts of corresponding size. At themoment when the blunt point t" is at the end of the travel which hasbeen assigned to itt-hat is to say, at the other extremity of the framefor the gelatin print the cross-head 0 having with one of its endsstruck against the stud p of the coupling-bar K, connecting thepawl-levers, the pawls 0, carried by said levers, are caused to engagewith the teeth of theratchets at such points as to produce the nextensuing movement of the frame or carriage G. In effecting thisengagement the levers J J are turned upon their supports in such adirection that the pawls will ride over the teeth of said ratchetswithout operating the latter. The pin 0, which in this motion oftranslation of the cross-head O, with which it is connected, hasremained free at a small distance from and above the rod on of thelifting tappets s and it, strikes against the tappet n, and by the formwhich is given to this tappet the bar Q, carrying the point to which itis firmly fixed, rises and is held in this new position by the hookedspring 2'), which bears against the piece q, fixed to the vertical guideThe graver and the point immediately leave the surfaces upon which theyare resting. In this motion of the cross-head 0 from the gelatin printjtoward the engravingplatez the shoulder of one of the rods b", situatedbehind the said cross-head, aotuates the lever of the commutator and thedirection of the current is instantaneously reversed. The return of thecross-head O to its initial position takes place immediately. Duringthis movement the coupling-bar K, connecting the pawl-levers, is urgedin the opposite direction to the end of its stroke by the pieces m n,which force the nuts L L to turn with a progressive movement equivalentto the distance between the cuts and so advance the carriage and all theparts attached to same by the same movement. This advance of thecarriage G may be obtained either by causing the nuts L L to turn, asshown in the accompanying drawings, and keeping the screws D D fixed orequally well by fixing the nuts L L and cansing the screws D D torotate. At the same moment the pin 0' strikes against the upper portionof the other tappet s the hooked spring 1) leaves the piece (1 and thetracercarrying bar Q rests the blunt point on the gelatin print. Thegraver,which has made the same movement, again places itself in contactwith the engraving-plate, the switch has re sumed its original positionthrough contact with the forward shoulder of the rod 6, the currentpasses through the armature in the reverse direction, and a second cutis executed, after which the cross-head takes back the apparatus in thesame manner ready for the next cut, and so on, as before, until thewhole surface of the gelatin has been gone over by the blunt point,after which the machine ceases working altogether, the current beinginterruplwl by the action of a projection 7L" upon the circuit-breakerg.

As above stated, the engraving the production of which we have beenconsidering is a plate representing any desired subject in re lief byparallel lines only; but supposing it is desired to reproduce in reliefthe same subject by cross'hatching and with equal exactitude, such ascannot be attained by any process hitherto in use because of the lengthof time during which the action of the acids employed has to continue,(more especially when a relief-engraving is required,) which actiondiminishes the strength of the drawing and endangers its sharpness, thearrange ment of the machine as above described is in no wise altered. Itis suflicient to simply arrange the gelatin print and the engravingplate upon the turn-table c c or d d, according to their dimensions, inthe manner already indicated for an engraving with parallel lines only,taking the precaution, however, to make their centers coincide asexactly as possible with those of the turn-tables and to see that thedistance which separates these centers is exactlyequal to the distanceseparating the point of the graver g and the point of the tracer t.

The first operation (that of producing the parallel cuts) may beexecuted in the manner above described, the cross-cuts being produced inthe same way after the turn-table has been caused to turn through thedesired angle.

From the above description of the succession of operations in engravingby my process by means of a gelatin print and a ma chine arranged asabove set forth it is clear that if the angle of the graver has beencorrectly determined and suitably located on the apparatus at therequired height, (which it is quite easy to elfect,) the distancesbetween the cuts being known, as well as the maximum height of thereliefs on the gelatin, it will be possible to obtain, by simplycompleting the electric circuit and without its being necessary tosuperintend the successive operations of engraving, a plate engraved inrelief, either in parallel lines only or crosshatching, which is anexact reproduction of the subject selected, capable of being used forprinting immediately Without requiring any retouching and for a largenumber of impressions, even with the quick rotary ma chines which arenow employed.

Should it be impracticable to make use of an electromotor for actuatingthe machine, any suit-able and independent motor may be used.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. In an engraving-machine, the combina tion with a bar Q having atracing-point at one end, of a bar R carrying a graving-tool, across-head O, a support on which the crosshead is movable, acontrolling-bar P lying parallel with and pivotally connected to the barR, a box upon one end of the cross-head provided with a stud lying in anopening in the controlling-bar P, a flexible connection between the barQ and the controlling-bar P,

and a slide on the bar Q resting on the edge 1 tion with a cross-head O,movable on a supof the bar R, substantially as described.

2. In an engraving-machine, the combination with a bar Q having atracing-point, of abar R lying beneath the bar Q and carrying a gravingtool, a controlling-bar P lying 1 against the bars Q and R, and having apivi otal connection with the latter, a cross-head O movable on asuitable support, one end of said cross-head having a fixed stud toengage an opening in one end of the controlling-bar P, a flexibleconnection between the latter and the bar Q at the end farthest from thetracer, and a slide on the bar Q resting on the edge of the bar R,substantially as described.

3. In an engraving-machine, the combination with a bar Q having atracing-point at one end, of a controlling-bar P parallel with said barQ and flexibly'oonnected to it at the other end, a bar R pivotallyconnected to the controlling-bar P between the ends of the latter andlying beneath the bar Q, a gravin-gtool carried by the end of said barR, an adjustable slide on the bar Q to' rest on said bar R between itspivotal point and the end carrying the graver, and a cross-head parallelwith the controlling-bar Pand having at one end a loose connection withthe same, substantially as described.

4c. In an engraving-machine, the combinaport N and having at one end afixed stud, of a controlling-bar P provided with an opening near one endto receive said stud and having at the same end a blunt point aprojecting below its lower edge, a bar Q having a tracing-point lyingbeneath the blunt point a and flexibly connected to the controlling-barP at its other end, a bar R having one end pivotally connected to thecontrolling-bar P near the middle of the latter and carrying agraving-tool on its other end, a slide on the bar Q resting on the edgeof the bar R, a support for a gelatin print, and a bridge V having its vends movable on said support and spanning the print, substantially asdescribed.

In testimony whereof 'I have hereunto set my hand this 8th day of June,1896.

AU GUSTIN SAR'IIR ANA.

